Orion-system RNE Modular Controller Manual do Utilizador descarregar pdf (Página 72)

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RNE CONTROLLER TROUBLESHOOTING

RNE Modular Controller Field Technical Guide

Thermistor Sensor Testing Instructions

Use the resistance column to check the thermistor sensor while

disconnected from the controllers (not powered).

Use the voltage column to check sensors while connected to powered

controllers. Read voltage with meter set on DC volts. Place the “-”

(minus) lead on GND terminal and the “+” (plus) lead on the sensor

input terminal being investigated.

If the voltage is above 5.08 VDC, then the sensor or wiring is “open.” If

the voltage is less than 0.05 VDC, then the sensor or wiring is shorted.

Temperature Sensor Testing

The following sensor voltage and resistance tables are provided to aid in

checking sensors that appear to be operating incorrectly. Many system

operating problems can be traced to incorrect sensor wiring. Be sure all

sensors are wired per the wiring diagrams in this manual.

If the sensors still do not appear to be operating or reading correctly,

check voltage and/or resistance to conﬁ rm that the sensor is operating

correctly per the tables. Please follow the notes and instructions below

each chart when checking sensors.

Temperature – Resistance –

Voltage for Type III 10 K Ohm

Thermistor Sensors

Temp

(ºF)

Resistance

(Ohms)

Voltage @

Input (VDC)

-10 93333 4.620

-5 80531 4.550

0 69822 4.474

5 60552 4.390

10 52500 4.297

15 45902 4.200

20 40147 4.095

25 35165 3.982

30 30805 3.862

35 27140 3.737

40 23874 3.605

45 21094 3.470

50 18655 3.330

52 17799 3.275

54 16956 3.217

56 16164 3.160

58 15385 3.100

60 14681 3.042

62 14014 2.985

64 13382 2.927

66 12758 2.867

68 12191 2.810

69 11906 2.780

70 11652 2.752

71 11379 2.722

72 11136 2.695

73 10878 2.665

Table 4: Temperature/Resistance for Type III 10K

Ohm Thermistor Sensors

Temperature – Resistance –

Voltage for Type III 10 K Ohm

Thermistor Sensors

Temp

(ºF)

Resistance

(Ohms)

Voltage @

Input (VDC)

74 10625 2.635

75 10398 2.607

76 10158 2.577

78 9711 2.520

80 9302 2.465

82 8893 2.407

84 8514 2.352

86 8153 2.297

88 7805 2.242

90 7472 2.187

95 6716 2.055

100 6047 1.927

105 5453 1.805

110 4923 1.687

115 4449 1.575

120 4030 1.469

125 3656 1.369

130 3317 1.274

135 3015 1.185

140 2743 1.101

145 2502 1.024

150 2288 0.952

Table 4, cont.: Temperature/Resistance for Type III

10K Ohm Thermistor Sensors

1 2 ... 67 68 69 70 71 72 73 74 75 76 77 ... 87 88

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